Means for connecting bimetallic conductors



June 2, 1925. l 1,539,962

H. J. sEUr-'ERT ET AL MEANS FOR CONNECTING BIMEITALLIC CONDUCTORS Filed March 27, 1925 lll Patented Jun; z, 192s.

UNITED kSTATES PATENT OFFICE.

HERMANN J'. SEUFEBT, 0F BROOKLYN, NEW YORK, AND FRIEDRIH SEUFERT, OF MUNICH,vv GERMANY.

To all whom, it may concern:l

Be y1t known. that we, HERMANN J. SEU- FERT and FRIEDRICH SEUFERT, citizens of the United States and Germany, respectively,v vthe former being a resident of Brooklyn, county of Kings, and State of New York,

and the latter a resident of Munich, Bavaria, Germany, have yinvented certain new and useful Improvements in Means for Con necting Bimetallic Conductors, of which the following is a specification.

The present invention relates to means for connecting bi-metallic conductors for electric high current installations.

The heretofore employed clamping means for bi-metallic conductors have been found objectionable because of their complex na ture and vthe difficulties arising in the installation thereof. The object of our invention is to obviate these drawbacks.

In the accompanying drawing, in whichv similar reference characters denote corresponding parts, Fig. 1 is a'longitudinal section of one embodlment of our invention;

Fig. 1a is a section on line 1*-1 thereof; Fig. 2 is a lonitudinal section of a modification thereof; ig. 3 is an elevation of said I modified form and Figs. 4 and 5 are similar sections showing different applications of the invention.

According to the construction shown in Fig. 1, 10 and 11 denote two sections of a bushing of which section 10 is formed with a threaded head piece 12 and section 11 with an end flange 13 and which are adapted to be separably joined together by a nut 14 as shown in the drawing. Each of these sections at its inner end 1s internally cylindrical as at 15 and conical at its outer end as at 16, and is adapted to bear a sleeve 17, which externally is shaped to conform with the internal shape of said sections of the bushing and which internally is conical at its inner end as at 18 and cylindrical at its outer ends as at 19. In the conical portion of each sleeve is adapted to bear a nozzle 20 in form of a truncated cone having a cylindrical bore 21, which at its inner end terminates in an outwardly widening mouth 22. This nozzle 20 is adapted to receive the steel portion a of the bi-metallic conductor, the free end of which is widened or bent in form of a knot. The copper or aluminum portion b of the conductor is received MEANS FOR CONNECTING BIMETALLIGCONDUCTOBS.

Application iiled March 27,1923. Serial No. 627,991.

by the cylindrical part of thek outer porti/on of the sleeve 17.k

Both the nozzle 20 and the sleeve 17 are longitudinally split as at 20', 17 to be resilient. The conical outer face of the nozzle 20 on the conical inner face 16 of the bushing are parallel, whereby the tension exerted on tightening the cable or conductor is uniformly distributed to the steel and aluminum or copper portions thereof and thestronger the pull on lthe conductor the more does its part become wedged in the bushing and nozzle. This construction has the advantage that, owing to the greater expansiveness of aluminum, the tension is chiefly taken up by the steel portion as desired, while the tightening of the aluminum portion and the resulting electric contact are insured.

` The construction is also advantageousbe- 'vice are rendered extremely simple.

V For the connection of a bi-metallio conductor ,to collecting shoes, etc., the following constructions may be used. According to Figs. 2y and 3., the shell serving as shoe 23 is formed with a threaded head piece 24 and the rigid bushing or shell 25 with a flange or collar 26 and the'same are ada tedto be joined and tightened'togetherxby a nut 14, as is in the first construction. f. Internally the shoe and bushing are conical in opposite directions and bear a correspondingly shaped single sleeve 27, split longitudinally as at 28. The inner bore of this sleeve is cylindrical, one part being wider to bear the copper or aluminum portion b of the conductor and the narrower part, the steel portion a, thereof.l It will e seen that by tightening the shoe and bushing through the nut, the-resilient sleeve will clench the two portions of the conducvsleeve 17 and nozzle 20 are constructed and /assembled as heretofore described. In case of strong pull 1n axial direction the nozzle 20 in pressed against the conical portion of the sleeve 17, while the conical portion of the latter is Apressed against the corresponding surfaceof the bushing 11, thereby-effecting electric contacts and insuring a connection which increases with the pull.

For special branch connections, a turnable cross shaped body 30 is mounted on a bolt 31 of the insulator body 32 and held in position. by a washer 33 and pin 34. lach branch of the body 30 is threaded at its'end as at 30 and has connected to it by a nut 14 a bushing 1I constructed and bearingl sleeve 17 and nozzle 20 as per modification shown in Fig. 1.

What we claim and desire to secure by Letters Patent is 1. 'Connecting'device for loi-metallic conductors, comprising a rigid outer shell and interposed resilientinner shells, the latter being adapted to bear 'the inner and outer parts of said conductor and on being compressed in said outer shell to tighten said conductor and insure a good electrical connection.

2. Connecting device for bi-rnetallic conductors, comprising a rigid outer'shell composed of two separably joined sections and a pair of interposed inner longitudinally split shells in each section, said inner shells being adapted to bear the inner and outer parts of said conductor and on being compressed in said outer shell to secure the same and insure a good electrical connection.

3. Connecting device for bi-metallic conductors, comprising a rigid outer shell anda pair of interposed resilient sleeves in each section, said sleeves being adapted to bear the inner and outer parts of said conductor and when compressed by said outer shell to tighten said conductor and insure a good electrical connection.

4. Connecting device for electric bi-meta-llio conductors, comprising a rigid shell .formed with an inner conical portion, a resilient conical inner shell in each section and a resilient conical nozzle in said inner shell, saidnozzle being adapted to leceive the inner part of the lli-metallic conductor and said inner shell the outer part of said condnctor, so that when the conductor is drawn tight said nozzle is compressed in said inner shell and the latter in the outer shell insuring a good electrical connection.

5. Connecting device for electric bi-metal lic conductors, comprising a rigid shell formed internally with oppositely directed conical parts an externally conical split Sleeve slidably engaging the internal coni` cal part of each outer shell section and having an internal conical portion, a second externally conical split sleeve slidably engaging the internal conical portion of said first named sleeve, said two sleeves being adapted to separately engage the inner and outer parts of said conductor and when compressed by said outer shell'section to insure a good electrical'connection.

In testimony whereof I aflix my signature in presence of two witnesses.

HERMANN J. SEUFERT. Witnesses e MAX S. ERDMANN, JOSEPH T. McMAHoN.

In testimony whereof I alix my signature in presence of two Witnesses.

.A FRIEDRICH SEUFERT. Witnesses:

ALEXANDER DE Soro, THEA JOHANNA KELLER. 

